R-6.5 Thermafiber® TopStop® Mineral Wool Insulation 1 1/2-in. x 3 1/2-in. x 4 1/2-in. x 36 in. (43.75 sq. ft.) | SAFB-TSZ1-TF

Insulation used for TopStop® is UL® and Intertek® (formerly OPL) Classified, and is approved for use in designs that otherwise call for Safing Insulation. It is available in 3 common sizes of trapezoidal shaped boards, as well as standard forming strips.

• Excellent performance in head-of-wall fire containment systems
• Fire resistant to temperatures above 2,000° F (1,093° C)
• Helps conserve energy, reduces greenhouse gases emissions
• Resists moisture
• Non-combustible